“Optimize” or “Optimise”—What's the difference?

Usage by country

Where each spelling is used

Of the 12 countries below, 6 prefer “optimize” and 4 prefer “optimise”. Usage levels are out of 100; the more common spelling in each country is in bold.

Usage level out of 100 (if available).
Country	optimize	optimise	Preference
United States	98	2	“optimize”
United Kingdom	44	56	“optimise”
India	75	25	“optimize”
Philippines	96	4	“optimize”
Canada	95	5	“optimize”
Australia	41	59	“optimise”
Liberia	0	0	Not enough data
Ireland	49	51	“optimise”
New Zealand	49	51	“optimise”
Jamaica	100	0	“optimize”
Trinidad & Tobago	100	0	“optimize”
Guyana	0	0	Not enough data

Usage

Examples in context

Real sentences for each spelling. Hover an example to copy it.

“optimize”

…intended to improve flight safety, optimize mission success during sustained operations,…
…WCS allows the user to optimize the machine for specific purposes.
…if so located would help optimize the natural potential of the…
…General Electric is designed to optimize the performance of assets.
…(P&G) is using CATIA to optimize its packagings.
…in geometric design are to optimize efficiency and safety while minimizing…
…ply numbers and thickness to optimize tone independently and in between…
…pricing, which is designed to optimize traffic flow at free-flow speeds.
…files, to improve performance and optimize storage (redundant overwrites are merged
A project to optimize coffee harvest was also carried…

“optimise”

…should be regularly checked to optimise wet grip and fuel efficiency
"To optimise the quantity of air drawn…
…J 15 was built to optimise the low power, small aircraft…
…also used in healthcare to optimise the condition of patients prior…
…was required to define and optimise the process parameters to selectively…
…pupils enable ambush predators to optimise their depth perception, and horizontal…
…that uses memory techniques to optimise learning.
…efficiency by financing projects which optimise the consumption of energy and…
…than turbofan engines, and to optimise the airliner to take advantage…
…that uses memory techniques to optimise learning.

Examples are Wikipedia snippets under the CC ShareAlike 3.0 license.

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